Fanning mill and grader



March 5, 1929. H. w. KolsTlN'EN A 1,704,684

FANNING MILL AND GRADER' Filed Aug. 6, 1925 4 Sheets-Sheet l March 5,1929. H, w, KolsTlNEN 1,704,684

FANNING MILL AND GRADER Mal'Ch 5, 1929. H. w. KOISTINEN 1,704,684

FNNING MILL AND GRADER Filed Aug. 6,v 1925 4 Sheets-Sheet 3 FANNING MILLAND GRADER Filed Aug. 6, 1925 4 Sheets-Sheet 4 Patented Mar. 5, 1929.

HENRY W. KOISTINEN, OF ERWIN, SOUTH DAKOTA.

FANNING MILL AND GRADER.

Application filed August 6, 1925.

My invention relates to improvements in fanning mills and grain cleanersand graders in which a series of sieves operate in conjunction withrevolving aprons above such sieves and stationary cross slats below thei the first series of sicves.

sieves, and the objects of my improvements are:

1. To provide means for steady and uniform feeding of grain over sieves.2. To provide for removable aprons, sieves and stationary cross slats.3. To provide for successive operations of cleaning and grading so as togive the sieves better opportunity to do effective work. A. To providefor the cleaning of grain live times in one continuous operation.

I attain these objects by the mechanisms shown in the accompanyingdrawings, in which Figure I is a vertical, longitudinal section of theinterior mechanism showing aprons, cross slats, and series of sieves andother parts necessary' to show operation of machine. Figure Il is a Viewof right side of machine. Figure III is a View of the left side of themachine.

Figure 1V is a view of the front side of the machine; Figure Vrepresents part of crank shafts and also the crank on one side; theother crank not shown.

Similar numerals refer to similar parts throughout the several views.The letter A, whenever used, refers to outside frame of the machine. Theletter B refers to the interior framework or shaker shoe containing Theletter C refers to the interior framework of the shaker shoe containingthe second series of sieves. The letter D refers to the interiorframework of the shaker shoe containing the third series of sieves.

The framework A supports the hopper and feeder of grain which is fittedwith the sliding board A2, allowing opening and closing of the opening lto permit grain to feed downwardly upon the shaker shoe board B1. Thesliding board A2 is fitted with the cogs A3 which are engaged by thecogs 2 on the cogged wheel 3. The cogged wheel 3 is keyed to the shaft4c which passes through suitable boXings on the frame posts A23. At theoutside ofthe frame posts A23 is attached the lever 5. It will be notedthat the sliding board A2 may be moved downwardly or upwardly by acorresponding movement of the lever 5. The lever 5 is fitted with thecatch 6 to hold the lever 5 on the cogged frame- Serial No. 48,645.

work 7 in whatever position placed. The hopper A1 is also fitted withthe shaft 9 five inches above the opening I. The shaft 9 runs throughsuitable boxings in the frame A. To the shaft 9 is attached the pulley10. The shaft 9 is, therefore, operated by means of the belt 11 passingover the pulley 10, as indicated in Figure IH. The shaker shoe B isfitted with the sieves B2, B3, and B4. The shaker shoe B is given theshaker movement by means of the shaker arm B5, attached to the shakershoe B at the pin B6 and fastened to the crank shaft 13 at the crankportion B7. While the drawings illustrate only the one shaker arm B5, Icall attention to the fact that my machine is equipped with double arms,one at either side of the shaker shoe B and operating on the crank shaft13, as indicated. The crank shaft 13 passes through suitable boxings inthe frame A and is fitted on the outside of the frame A with the pulleys14 and 15 properly keyed to the crank shaft 13, The crank shaft 13 is,therefore, operated by means of the belt 16 passing over the pulley 14.

To the frame A at AL4 is fastened the adjustable framework A5 to containthe endless aprons 17, 18 and 19 and the cross slat cleaner 20. It willbe noted that the framework A5 is fastened to the frame A by theremovable pins A4. The frame A5 is fitted with holes, as indicated, toallow adjustment of the frame A5. It is also noted that the frame A isso constructed to allow the adjustment forwardly and backwardl on theframe A of the removable pins The endless aprons 17 18 and 19 revolveover the rollers 25, which rollers 25 are fastened to suitable shaftsset in suitable boXings in the frame A5, as indicated, at the boxings26. The endless aprons 17 18 and 19 are operated by the pulleys 27, 28and 29, respectively, keyed to the three upper rollers 25. The pulley 27is operated by the belt 30 passing over the pulley 27 and the pulley 31.The pulley 29 is operated by the belt 32 passing over the pulley 29 andthe pulley 10. The pulley 10 is a double pulley allowing the use of thebelts 11 and 32, as indicated. The pulley 29 is a double pulley allowingthe use of two belts as indicated. Thus, it will be noted that thepulley 29 serves to drive the pulley 28 by means of the belt 33.

The frame A*5 serves as a framework fitted with the tracks A6 to carrythe rollers BE which are appropriately fastened to the shaker shoe B. Itwill be noted that the frame A serves as a carrier for the shaker shoe Bby the movement of the rollers B8 on the tracks AG at the slots A7. Thecross slats 20 are fastened in the frame A5 by the rods A9.

1t will be noted that the grain passing through the opening I falls uponthe board B1 of the shaker shoe B which carries the grain downwardlyalong the board B1 to the sieves B2, B3 and B1, respectively. As thegrain passes down the sieve B2, the endless apron 17 passes downwardlyover the sieve B2 keeping the sieve B2 clean and carrying the grainevenly over the sieve B2. As the grain passes through the sieve B2 itfalls on the endless apron 18 and is carried upwardly and over to theupper end of the sieve B9, repeating the operation in the same manner ason the sieve B2. As the grain passes through the sieve B9, it falls onthe endless apron 19 and is again carried to the upper end of the sieveB1, and the operation is again repeated in the same manner as on thesieves B2 and B3, respectively. The stationary cross slats 20 under thesieve B4 serve to keep the sieve B1 from becoming clogged, at the sametime allowing the grain to fall through the sieve B4 and between thecross slats 20 upon the board B9 which carries the grain downwardly tothe lower end of the board B9 where the grain drops to the sieve C1fitted into the shaker shoe C. It will be noted that coarse chaff, strawand dirt from the grain passes over the sieves B2, B9, and B1,respectively, and is carried out of the ma-chine atthelower end of theshaker shoe B at the boards B1".

The shaker shoe C is fitted with the rollers C2 fastened respectively tothe shaker shoe C by the pins C9. The rollers C2 pass through the'slotsA9 in the frame A and the rollers C2 rest on the tracks A1o which serveas carriers'for the shaker shoe C and allow shaking movement of theshaker shoe C. The shaker shoe C is operated by the shaker arm C1tfastened to the shaker shoe C by the pin C5. The shaker arm C1 isfastened to the crank shaft 34 at the boxing C9. The shaker shoe C isalso fitted with double shaker arm C1 in the same manner as the shakershoe B. The crank shaft 34 passes through suitable boxings in the frameA. At the ends of the crank shaft 34 is fastened the pulleys 35 and 36,respectively. The crank shaft 34 is operated bythe belt 37 passing overthe pulleys 35 and 38.

The grain, after falling upon the sieve C1, passes downwardly over thesieve C1 which is kept clean by the cross slats supported on p rods A12.The screenings passing through the sieve C1 fall between the cross slatsA11 upon the board C7 and are carried back over the lower end of thevboard C7 into the conveyer 39. The conveyer 39 is fitted with the auger49 so constructed to carry the screenings from the center of theconveyer to both sides of the machine. At each end of the conveyer 39are the pipes 48 to carry the screenings to the shaker shoe D, asindicated. The grain passing over the sieve C1 falls upon the board C8which carries the grain downwardly over the end of the board CS to theshaker shoe D. As the grain falls from the lower end of the board CS tothe sieve D1, the grain is cleaned of dust and chaff by means of the airblast from the fan casing A13.

The shaker shoe D is fitted with the rollers D2 by the pins D2. Therollers D2 pass through the slots A1A1 and rest on the tracks A15 whichserve as a carrier for the shaker shoe D and allow the shaker movementof the shaker shoe D, as indicated. The shaker movement of the shakershoe D is given by the shaker arms D1, pivoted link D5 and shaker arm D9which are at both sides at inside. The shaker arm Dl1 is fastened to theshaker shoe D by the pin D7 and the shaker arm D6 is fastened to thecrank shaft 40 at the boxing D9. The crank shaft 40 passes throughsuitable boXings in the frame A at the right side of the machine. To thecrank shaft 40 is fastened the sprocket 41 and the crank shaft 40 isoperated by means of the chain 42 passing over the sprocket 41 and thelarge drive sprocket 43. The connecting pivoted arm D5 is fastened tothe shaker arms D1 and D9, respectively, at the pins D9, while theshaker arm D5 is fastened to the frame A by the pin A19.

As the grain passes over the sieve D1, it moves downwardly over thelower end of the board .D10 delivering the cleaned and graded grain atthe back of the machine at X. Any screenings that might be left in thegrain as it passes over the sieve D1 falls through the sieve D1 andbetween the cross slats A17 on the sieve D11. It will also be noted thatthe screenings that pass from the conveyer 39 through the pipes 48 aredeposited on the sieve D11 and are carried downwardly over the sieve D11and over the board D12 and are carried out of the ma* chine at the pointY. The sieve D11 should be of the kind that will permit all screeningsto pass between same and through the cross slats D19 so that allscreenings will be delivered out of the machine at the point Z at thelower end of the board D19.

On the crank shaft 40 is fastened the fan 44 to provide for air blast toclean grain, as indicated. At each end of the drum A13 are vents A19 toallow air to enter drum. The upper partof the drum A13 is fitted with ahinged cover A2o which may be closed or opened in order to regulate airblast between the shaker shoes C and D. To the back part of the frame Aat the point A21 is a hinged board cover A22 which may be removed orclosed or opened as desired by the operator of the machine. The motivepower for the machine is supplied by hand operation of the main sprocketwheel 43 at the handle 45, or, if desired, suitable arrangements may bemade for providing pulley for power driving, if necessary. The sprocketwheel 43 drives the crank shaft 40 and the fan 44 and also supplies thepower to drive the crank shaft 34 by means of the belt 37, asillustrated in Figure III. To the crank shaft 34 is fastened the pulley36 which drives the pulley 14 by means of the belt 1G and operates themill and grader, as hereinbefore explained. The sprocket wheel 43revolves on the end of the crank shaft 34 to the outside of the pulley36, i. e., the crank shaft 34 extends beyond the pulley so as to serveas the shaft on which the sprocket 43 revolves. The auger 30 is operatedby means of the belt 4G passing over the pulley 47 on the auger 3() andpassing over the double pulley 15.

While the plan of my invention provides for the removal of endlessaprons and stationary cross slats and sieves and allows several seriesof sieves and stationary cross slats, nevertheless I prefer to carry outmy invention in the form as herein explained, providing for three sievesin the shaker shoe B with three endless aprons above such sieves,respectively, and the stationary cross slats under the third sieve ofthe shaker shoe B and a similar sieve in shaker shoe C littcd withstationary cross slats under the sieve in shaker shoe C and two sievesin shaker shoe D litted with stationary cross slats under the sieve ofshaker shoe D. The sieves of shaker shoe B are designed to carry olfcourse chaff and coarse foul seed. The sieve of shaker shoe C isdesigned to sert as a grader, removing smaller foul seed and grain fromthe grade of grain desired. The sieves of shaker shoe D are designed toserve in grading the grain and remove from the better grades allscreenings and small foul seed.

I am aware that prior to my invention farming mills and grain cleanershave been made with series of shaker sieves and air blast passing oversame. I therefore, do not claim such a combination broadly.

I claim:

l. In a grain-separating machine, a supporting-frame, an inclinedreciprocatory sieve-shoe supported in said frame, a plurality ofsuperimposed sieves in said shoe, a plurality of rotatable endlessaprons supported on said frame and extending through the sieve-shoe,each apron being supported above and parallel to a sieve of said shoe,the lower laps of the endless aprons arranged to travel downwardly inclose proximity to the upper surfaces of the sieves, the upper lapsdelivering grain to the upper ends of said sieves, a sieve cleaning rackcarried by the supporting frame and extending through said shoe closelyadjacent to the under surface of the lowermost sieve carried by thesieve-shoe.

2. In a grain separating machine a supporting frame, a pair of reverselyinclined, superimposed, reciprocatory screen-shoes carried by saidframe, a screen supported in said upper screen shoe, a pair ofsuperimposed screens supported in said lower screenshoe, a screencleaning rack carried by the supporting frame and extending through saidshoe closely adjacent to the under surface of the screen carried by theupper screen shoe, a grain discharge board in said upper screen shoe, atransverse trough carried by the supporting frame below and parallel tothe outer edge of said discharge board, a two-way conveyer in saidtransverse trough, a down spout carried by each end of said trough, saiddown spouts each discharging upon the top of the lower screen of thelower screen-shoe.

The structure set forth in claim 2, including a fan-casing mounted onthe supporting frame, opposite said screen shoes, a fan in said casingarranged to direct a blast of air longitudinally of and between saidscreen-shoes.

In testimony whereof, I ailix my signature.

HENRY W. KOISTIN EN

